Home / 712,518.86-983,239.50-390,222.05

Finding the Fourth Proportional to 712,518.86, 983,239.50 and 390,222.05

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Solution

The fourth proportional to 712,518.86, 983,239.50 and 390,222.05 is: 538,486.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,518.86 : 983,239.50 = 390,222.05 : x
  2. Step 2: Convert to fraction form
    712,518.86/983,239.50 = 390,222.05/x
  3. Step 3: Cross multiply
    712,518.86x = 983,239.50 × 390,222.05
  4. Step 4: Simplify right side
    712,518.86x = 383,681,728,414.78
  5. Step 5: Solve for x
    x = 383,681,728,414.78/712,518.86
  6. Step 6: Final answer
    x = 538,486.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.